When you see an emergency vehicle responding to an emergency you are required?

Make sure they can pass by your vehicle.

Follow instruction if there is any.

If you're in the way : GET OUT OF THE WAY.

If you're waiting at a red light, carefully and slowly engage yourself so that the emergency vehicle can pass. Other road users will be warned by the siren.

In most country, willingly blocking an emergency vehicle can lead to prosecutions in crime law.